package com.quan.common.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;

import org.apache.commons.lang3.time.DateFormatUtils;

import com.quan.common.enums.DateStyle;

public class DateUtils {

	public final static String FORMAT_DATE = "yyyy-MM-dd";
	public final static String FORMAT_DATE_ZH = "yyyy年MM月dd日";
	public final static String FORMAT_TIME = "HH:mm:ss";
	public final static String FORMAT_TIME_ZH = "HH时mm分ss秒";
	public final static String FORMAT_DATETIME = "yyyy-MM-dd HH:mm:ss";
	public final static String FORMAT_DATETIME_ZH = "yyyy年MM月dd日 HH时mm分ss秒";
	public final static String FORMAT_DATE_NOTHING = "yyyyMMdd";
	public final static String FORMAT_DATETIME_NOTHING = "yyyyMMddHHmmss";
	public final static String FORMAT_DATETIMES_NOTHING = "yyyyMMddHHmmssSSS";

	public static String format(Date date, DateStyle style) {
		return DateFormatUtils.format(date, style.getValue());
	}

	public static Date parse(String dateStr, DateStyle style) {
		try {
			return new SimpleDateFormat(style.getValue()).parse(dateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * 将日期字符串解析为日期对象
	 * 
	 * @param dateStr 日期字符串
	 * @param pattern 格式（默认为：yyyy-MM-dd）
	 * @return
	 * @throws ParseException
	 */
	public static Date parseDate(String dateStr, String... pattern) {
		try {
			if (null == dateStr) {
				return null;
			} else if (pattern != null && pattern.length > 0) {
				return new SimpleDateFormat(pattern.toString()).parse(dateStr);
			} else if (pattern == null || pattern.length == 0) {
				return new SimpleDateFormat(FORMAT_DATETIME).parse(dateStr);
			} else {
				return null;
			}
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * 将日期对象格式化为日期字符串
	 * 
	 * @param date    日期对象
	 * @param pattern 格式（默认为：yyyy-MM-dd）
	 * @return
	 */
	public static String formatDate(Date date, Object... pattern) {
		String formatDate = null;
		if (pattern != null && pattern.length > 0) {
			formatDate = DateFormatUtils.format(date, pattern[0].toString());
		} else {
			formatDate = DateFormatUtils.format(date, "yyyy-MM-dd");
		}
		return formatDate;
	}

	/**
	 * 得到日期时间字符串，转换格式（yyyy-MM-dd HH:mm:ss）
	 */
	public static String formatDateTime(Date date) {
		return formatDate(date, "yyyy-MM-dd HH:mm:ss");
	}

	/**
	 * 得到日期时间字符串，转换格式（yyyy-MM-dd HH:mm:ss）
	 */
	public static String formatMillSecDateTime(long date) {
		return formatDate(new Date(date), "yyyy-MM-dd HH:mm:ss");
	}

	/**
	 * 得到当前时间字符串 格式（HH:mm:ss）
	 */
	public static String getTime() {
		return formatDate(new Date(), "HH:mm:ss");
	}

	/**
	 * 得到当前日期字符串 格式（yyyy-MM-dd）
	 */
	public static String getDate() {
		return getDate("yyyy-MM-dd");
	}

	/**
	 * 得到当前日期字符串 格式（yyyy-MM-dd） pattern可以为："yyyy-MM-dd" "HH:mm:ss" "E"
	 */
	public static String getDate(String pattern) {
		return DateFormatUtils.format(new Date(), pattern);
	}

	/**
	 * 得到当前日期和时间字符串 格式（yyyy-MM-dd HH:mm:ss）
	 */
	public static String getDateTime() {
		return formatDate(new Date(), "yyyy-MM-dd HH:mm:ss");
	}

	/**
	 * 得到当前年份字符串 格式（yyyy）
	 */
	public static String getYear() {
		return formatDate(new Date(), "yyyy");
	}

	/**
	 * 得到当前月份字符串 格式（MM）
	 */
	public static String getMonth() {
		return formatDate(new Date(), "MM");
	}

	/**
	 * 得到当天字符串 格式（dd）
	 */
	public static String getDay() {
		return formatDate(new Date(), "dd");
	}

	/**
	 * 得到当前星期字符串 格式（E）星期几
	 */
	public static String getWeek() {
		return formatDate(new Date(), "E");
	}

	/**
	 * 获取过去的天数
	 * 
	 * @param date
	 * @return
	 */
	public static long pastDays(Date date) {
		long t = System.currentTimeMillis() - date.getTime();
		return t / (24 * 60 * 60 * 1000);
	}

	/**
	 * 获取过去的小时
	 * 
	 * @param date
	 * @return
	 */
	public static long pastHour(Date date) {
		long t = System.currentTimeMillis() - date.getTime();
		return t / (60 * 60 * 1000);
	}

	/**
	 * 获取过去的分钟
	 * 
	 * @param date
	 * @return
	 */
	public static long pastMinutes(Date date) {
		long t = System.currentTimeMillis() - date.getTime();
		return t / (60 * 1000);
	}

	/**
	 * 转换为时间（天,时:分:秒.毫秒）
	 * 
	 * @param timeMillis
	 * @return
	 */
	public static String formatDateTime(long timeMillis) {
		long day = timeMillis / (24 * 60 * 60 * 1000);
		long hour = (timeMillis / (60 * 60 * 1000) - day * 24);
		long min = ((timeMillis / (60 * 1000)) - day * 24 * 60 - hour * 60);
		long s = (timeMillis / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
		long sss = (timeMillis - day * 24 * 60 * 60 * 1000 - hour * 60 * 60 * 1000 - min * 60 * 1000 - s * 1000);
		return (day > 0 ? day + "," : "") + hour + ":" + min + ":" + s + "." + sss;
	}

	/**
	 * 获取两个日期之间的天数
	 *
	 * @param before
	 * @param after
	 * @return
	 */
	public static double getDistanceOfTwoDate(Date before, Date after) {
		long beforeTime = before.getTime();
		long afterTime = after.getTime();
		return (afterTime - beforeTime) / (1000 * 60 * 60 * 24);
	}

	/**
	 * 日期加天数,可以向前加，向后加
	 * 
	 * @param date 日期
	 * @param day  天数
	 * @return
	 */
	public static Date addDay(Date date, int day) {
		Calendar c = Calendar.getInstance();
		c.setTimeInMillis(getMillis(date) + ((long) day) * 24 * 3600 * 1000);
		return c.getTime();
	}

	/**
	 * 当前时间加减分钟
	 * 
	 * @param minute +5 / -5
	 * @return
	 */
	public static long computeMinute(int minute) {
		return computeDatetime(new Date(), Calendar.MINUTE, minute);
	}
	
	/**
	 * 当前时间加减小时
	 * 
	 * @param minute +5 / -5
	 * @return
	 */
	public static long computeHour(int hour) {
		return computeDatetime(new Date(), Calendar.HOUR, hour);
	}

	/**
	 * 日期时间加分钟
	 * 
	 * @param date 日期
	 * @return 毫秒
	 */
	/**
	 * 日期时间加减
	 * @param date 日期
	 * @param type 加减类型
	 * @param num +5 / -5
	 * @return
	 */
	public static long computeDatetime(Date date, int type, int num) {
		Calendar c = Calendar.getInstance();
		c.setTime(date);
		c.add(type, num);
		return c.getTimeInMillis();
	}

	/**
	 * 获取当前日期的0点
	 * 
	 * @return
	 */
	public static long getZeroMilliSecond() {
		Calendar cal = Calendar.getInstance();
		cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
		Date beginOfDate = cal.getTime();
		return beginOfDate.getTime();
	}

	/**
	 * 获取当前日期的24点，即明天的0点的毫秒数
	 * 
	 * @return
	 */
	public static long get24HourMilliSecond() {
		Calendar cal = Calendar.getInstance();
		cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), 24, 00, 00);
		Date endOfDate = cal.getTime();
		return endOfDate.getTime();
	}

	/**
	 * 返回日期代表的毫秒
	 * 
	 * @param date 日期
	 * @return
	 */
	public static long getMillis(Date date) {
		Calendar c = Calendar.getInstance();
		c.setTime(date);
		return c.getTimeInMillis();
	}

	/**
	 * 两个日期相差的天数 date1 - date2 剩余天数
	 * 
	 * @param date1 日期
	 * @param date2 日期
	 * @return
	 */
	public static int betweenTwoDates(Date date1, Date date2) {
		return (int) ((getMillis(date1) - getMillis(date2)) / (24 * 3600 * 1000));
	}

	/**
	 * java.util.Date --> java.time.LocalDateTime
	 * @return
	 */
	public static LocalDateTime UDateToLocalDateTime(Date date) {
		Instant instant = date.toInstant();
		ZoneId zone = ZoneId.systemDefault();
		return LocalDateTime.ofInstant(instant, zone);
	}

	/**
	 * java.util.Date --> java.time.LocalDate
	 * @return
	 */
	public static LocalDate UDateToLocalDate(Date date) {
		Instant instant = date.toInstant();
		ZoneId zone = ZoneId.systemDefault();
		LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone);
		return localDateTime.toLocalDate();
	}

	/**
	 * java.util.Date --> java.time.LocalTime
	 * @return
	 */
	public static LocalTime UDateToLocalTime(Date date) {
		Instant instant = date.toInstant();
		ZoneId zone = ZoneId.systemDefault();
		LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone);
		return localDateTime.toLocalTime();
	}

	/**
	 * java.time.LocalDateTime --> java.util.Date
	 * @return
	 */
	public static Date LocalDateTimeToUdate(LocalDateTime localDateTime) {
		ZoneId zone = ZoneId.systemDefault();
		Instant instant = localDateTime.atZone(zone).toInstant();
		return Date.from(instant);
	}

	/**
	 * java.time.LocalDate --> java.util.Date
	 * @return
	 */
	public static Date LocalDateToUdate(LocalDate localDate) {
		ZoneId zone = ZoneId.systemDefault();
		Instant instant = localDate.atStartOfDay().atZone(zone).toInstant();
		return Date.from(instant);
	}

	/**
	 * java.time.LocalTime --> java.util.Date
	 * @return
	 */
	public static Date LocalTimeToUdate(LocalDate localDate, LocalTime localTime) {
		LocalDateTime localDateTime = LocalDateTime.of(localDate, localTime);
		ZoneId zone = ZoneId.systemDefault();
		Instant instant = localDateTime.atZone(zone).toInstant();
		return Date.from(instant);
	}
	
	/**
	 * 当前时间减去多少小时
	 * @param hours
	 * @return
	 */
	public static LocalDateTime minusHours(int hours) {
		return LocalDateTime.now().minusHours(hours);
	}
	
	/**
	 * 当前时间减去多少分钟
	 * @param minutes
	 * @return
	 */
	public static LocalDateTime minusMinutes(int minutes) {
		return LocalDateTime.now().minusMinutes(minutes);
	}

	public static void main(String[] args) {
		Calendar c = Calendar.getInstance();
		c.setTime(new Date());

		System.out.println(DateUtils.formatDateTime(c.getTime()));

		c.add(Calendar.MINUTE, 5);
		c.add(Calendar.SECOND, 5);

		System.out.println(DateUtils.formatDateTime(c.getTime()));

		System.out.println(computeMinute(10));
		System.out.println(formatMillSecDateTime(computeMinute(10)));

		Date parseDate = parseDate("2018-02-13 14:49:45");
		System.out.println(formatMillSecDateTime(computeDatetime(parseDate, Calendar.HOUR, 10)));

		/*
		 * System.out.println(formatDateTime(addDay(new Date(), -1)));
		 * System.out.println(formatDateTime(addDay(new Date(), 1)));
		 * 
		 * int betweenTwoDates = betweenTwoDates(parseDate("2017-11-19"),
		 * parseDate("2017-11-19", FORMAT_DATE)) ; System.out.println(betweenTwoDates);
		 * System.out.println(DateUtils.getDate(DateUtils.FORMAT_DATETIMES_NOTHING));
		 * System.out.println(DateUtils.getDate(DateUtils.FORMAT_DATETIMES_NOTHING));
		 * System.out.println(DateUtils.getDate(DateUtils.FORMAT_DATETIMES_NOTHING));
		 */

		// System.out.println(format(new Date(), DateStyle.YYYY_MM_DD));
		// System.out.println(parse("2018-02-13 14:49:45", DateStyle.YYYY_MM_DD));

		System.out.println("-------------------------------");
		LocalDate today = LocalDate.now();
		System.out.println(today);
		System.out.println(today.getYear());
		System.out.println(today.getMonthValue());
		System.out.println(today.getDayOfMonth());

		LocalTime time = LocalTime.now();
		LocalTime newTime = time.plusHours(2); // adding two hours

		DateTimeFormatter ofPattern = DateTimeFormatter.ofPattern("HH:mm:ss");
		System.out.println("加两小时 : " + newTime.format(ofPattern));
		
		System.out.println(DateUtils.UDateToLocalDate(DateUtils.parse("1988-05-11", DateStyle.YYYY_MM_DD)));
		
		String ss1 = "2004-09-15";
		double distanceOfTwoDate = DateUtils.getDistanceOfTwoDate(DateUtils.parse(ss1, DateStyle.YYYY_MM_DD), new Date());
		
		System.out.println(distanceOfTwoDate);
		
		System.out.println(distanceOfTwoDate / 365);
		System.out.println(MathUtil.format((distanceOfTwoDate / 365), "#.#"));
		
//		LocalDate date = LocalDate.now();
//		LocalDate end = date.plusDays(30);
//	    DateTimeFormatter formatters = DateTimeFormatter.ofPattern("MM-dd");
//	    String text1 = date.format(formatters);
//	    String text2 = end.format(formatters);
//	    System.out.println(text1);
//	    System.out.println(text2);
		
		Date zzDate = DateUtils.parse("2019-07-26", DateStyle.YYYY_MM_DD);
		Date curDate = DateUtils.parse(DateUtils.getDate(), DateStyle.YYYY_MM_DD);
		
		long zzMillis = DateUtils.getMillis(zzDate);
		long curMillis = DateUtils.getMillis(curDate);
		
		System.out.println(zzMillis);
		System.out.println(curMillis);
		
		LocalDateTime dateTime = LocalDateTime.now().minusHours(9);
		
		System.out.println(dateTime);
		
		Calendar cc = Calendar.getInstance();
		cc.setTime(new Date());
		//cc.add(Calendar.HOUR, -1);
		cc.add(Calendar.MINUTE, -2);
		
		System.out.println(formatDateTime(cc.getTime()));

	}

}
